Patent
   D573620
Priority
Feb 09 2007
Filed
Feb 09 2007
Issued
Jul 22 2008
Expiry
Jul 22 2022
Assg.orig
Entity
unknown
2
16
n/a
The ornamental design for a self sealing piston ring, as shown and described.

FIG. 1 is a perspective view of the piston ring;

FIG. 2 is a front elevation view of the piston ring, with the back elevation, left elevation and right elevation views identical to the front elevation view;

FIG. 3 is a top plan view of the piston ring;

FIG. 4 is a bottom plan view of the piston ring; and,

FIG. 5 is a sectional view of the piston ring taken along line 55 of FIG. 1.

Walton, Frank A.

Patent Priority Assignee Title
D847230, Jul 08 2016 Ackley Machine Corporation Carrier pocket for longitudinally compressed tablet
D881958, May 14 2018 Samyoung Machinery Co., Ltd. Piston ring for internal combustion engine
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5117742, Apr 28 1989 Iwata Air Compressor Mfg. Co. Ltd. Piston of composite material with C-shaped ring groove
5676380, Oct 02 1996 Ingersoll-Rand Company Venting piston ring
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D394866, Dec 20 1996 DELTRANS, INC Waved clutch piston ring
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D490447, Oct 08 2002 Jacobs Corporation Roll shell
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Feb 09 2007Dosmatic Usa, Inc.(assignment on the face of the patent)
Feb 09 2007HARPER, FRANK ADOSMATIC USA, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0188760144 pdf
Feb 09 2007WALTON, FRANK A DOSMATIC USA, INC CORRECTIVE ASSIGNMENT TO CORRECT THE NAME OF ASSIGNOR PREVIOUSLY RECORDED ON REEL 018876 FRAME 0144 ASSIGNOR S HEREBY CONFIRMS THE FRANK A HARPER 0188790141 pdf
May 02 2011DOSMATIC U S A , INC Delaware Capital FormationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0262710306 pdf
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